1. FALLOUT 3 - I love the massive game platform, and the fact that, despite reaching the maximum level 30, and completing the main story line, there is still more I can do. Probably the most effective $60 I ever spent on a game. It definitely was worth every penny. I'm especially excited for the new Nightmare mode in New Vegas, the added difficulty of maintaining hunger and thirst levels sounds like a welcome challenge.

2. ALAN WAKE - I loved the unique storyline, and the simplicity. There aren't 500 different weapons you have to switch between, just a flashlight, a handfull of guns, and flares or flashbangs. The graphics are pretty good, and the whole idea behind the story keeps you interested the entire time. I absolutely loved the ending it was so weird.

3. BIOSHOCK (1 & 2) - The first one had a better story to me, whereas the second, almost doesn't have one, it's an extension of the last, and doesn't stand out as much. But the graphics in 2 are impressive, and I love taking on the persona of Big Daddy. The story to 1 definitely wins though, because there were alot of unknowns, and twists in the plot. It was addictive, and the second, wasn't quite as effective, for me anyway.

Now I know I'm leaving out the obvious answers, like Halo, and COD, but the above 3 stand out to me, more than those. (:

I'm glad someone mentioned FFXIII. Even though it wasn't the best of the series I still love each and everyone one of them. Mass Effect 1/2 are without a doubt two of my favorite 360 games. Bioshock gets major originality and atmosphere points.